Genuine OEM Volkswagen Radiator Upper Coolant Hose, part number 5N0121101G. This hose is responsible for transferring hot coolant from the engine to the radiator, playing a vital role in the engine's cooling system. It is positioned as the upper connection between the engine and radiator. This molded rubber hose, approximately 0.58 m in length, ensures the correct routing geometry and material resistance to heat and pressure for reliable, leak-free coolant circulation.